<template>
  <div class="sidebar">
    <el-menu
        class="sidebar-el-menu"
        :default-active="onRoutes"
        :collapse="collapse"
        background-color="#324157"
        text-color="#bfcbd9"
        active-text-color="#20a0ff"
        unique-opened
        router
    >
      <template v-for="item in items">
        <template v-if="item.subs">
          <el-submenu :index="item.index" :key="item.index">
            <template slot="title">
              <i :class="item.icon"></i>
              <span>{{ item.title }}</span>
            </template>
            <template v-for="subItem in item.subs">
              <el-submenu v-if="subItem.subs" :index="subItem.index" :key="subItem.index">
                <template slot="title">{{ subItem.title }}</template>
                <el-menu-item v-for="(threeItem, i) in subItem.subs" :key="i" :index="threeItem.index">{{
                    threeItem.title
                  }}
                </el-menu-item>
              </el-submenu>
              <el-menu-item v-else :index="subItem.index" :key="subItem.index">{{ subItem.title }}</el-menu-item>
            </template>
          </el-submenu>
        </template>
        <template v-else>
          <el-menu-item :index="item.index" :key="item.index">
            <i :class="item.icon"></i>
            <template #title> {{ item.title }}</template>
          </el-menu-item>
        </template>
      </template>
    </el-menu>


  </div>
</template>

<script>
export default {
  data() {
    return {
      items: [
        {
          icon: 'el-icon-suitcase-1',
          index: 'customer',
          title: '客户信息'
        },
        {
          icon: 'el-icon-suitcase-1',
          index: 'goods',
          title: '商品列表'
        },
        {
          icon: 'el-icon-suitcase-1',
          index: 'orders',
          title: '订单信息'
        },
        // {
        //   icon: 'el-icon-suitcase-1',
        //   index: 'details',
        //   title: '订单细则'
        // },
        {
          icon: 'el-icon-suitcase-1',
          index: 'vendor',
          title: '厂家信息'
        }
      ]
    };
  },
  computed: {
    onRoutes() {
      return this.$route.path.replace('/', '');
    },
  },
  created() {
    // 通过 Event Bus 进行组件间通信，来折叠侧边栏
    bus.$on('collapse', (msg) => {
      this.collapse = msg;
      bus.$emit('collapse-content', msg);
    });
  }
};
</script>

<style scoped>
.sidebar {
  display: block;
  position: absolute;
  left: 0;
  top: 70px;
  bottom: 0;
  overflow-y: scroll;
}

.sidebar::-webkit-scrollbar {
  width: 0;
}

.sidebar-el-menu:not(.el-menu--collapse) {
  width: 250px;
}

.sidebar > ul {
  height: 100%;
}
</style>
